TABLE 3.
Antibiotic resistance and phage types of 275 S. enterica serotype Typhimurium strains isolated from 1995 to 1998a
| Phage type | No. of strains | No. (%) of resistant strains
|
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AMP | AMC | TET | SUL | TMP | SXT | CHL | STR | KAN | NEO | GEN | TOB | NAL | ||
| 104 | 48 | 48 (100) | 3 (6) | 46 (96) | 46 (96) | 3 (6) | 2 (4) | 45 (94) | 46 (96) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| 104 b | 30 | 30 (100) | 4 (13) | 28 (93) | 30 (100) | 5 (17) | 5 (17) | 22 (73) | 30 (100) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| 193 | 30 | 18 (60) | 4 (13) | 26 (87) | 24 (80) | 16 (53) | 16 (53) | 6 (20) | 25 (83) | 5 (17) | 5 (17) | 0 (0) | 0 (0) | 1 (3.3) |
| 120 | 21 | 21 (100) | 5 (24) | 21 (100) | 20 (95) | 4 (19) | 4 (19) | 13 (62) | 20 (95) | 4 (19) | 3 (14) | 0 (0) | 0 (0) | 0 (0) |
| 195 | 9 | 6 | 1 | 6 | 5 | 5 | 5 | 4 | 4 | 3 | 3 | 1 | 1 | 0 |
| 10 | 9 | 9 | 1 | 9 | 9 | 9 | 9 | 8 | 9 | 0 | 0 | 9 | 9 | 0 |
| U-302 | 5 | 4 | 1 | 5 | 5 | 1 | 1 | 5 | 5 | 0 | 0 | 0 | 0 | 0 |
| 12 | 4 | 2 | 0 | 4 | 3 | 1 | 1 | 1 | 2 | 0 | 0 | 0 | 0 | 0 |
| 124 | 4 | 3 | 0 | 3 | 4 | 2 | 2 | 3 | 2 | 1 | 1 | 0 | 0 | 1 |
| 204 | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| 204 c | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| 161 | 2 | 1 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| 197 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 0 |
| 184 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| 179 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
| Otherb | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| NSP | 19 | 16 (84) | 7 (37) | 16 (84) | 16 (84) | 2 (11) | 2 (11) | 14 (74) | 16 (84) | 1 (5) | 2 (11) | 0 | 0 | 1 (5) |
| NT | 82 | 73 (89) | 14 (17) | 76 (93) | 76 (93) | 12 (15) | 12 (15) | 67 (82) | 75 (91) | 0 | 0 | 6 (7) | 6 (7) | 0 |
a
All strains were susceptible to cefotaxime and ciprofloxacin. Abbreviations: AMC, co-amoxiclav; AMP, ampicillin; CHL, chloramphenicol; GEN, gentamicin; KAN, kanamycin; NAL, nalidixic acid; NEO, neomycin; STR, streptomycin; SUL, sulfonamides; TET, tetracycline; TOB, tobramycin; TMP, trimethoprim; SXT, trimethoprim-sulfamethoxazole; NSP, nonstandard pattern; NT, untypeable.
b
Other phage types: 22, 23, 29, 52, and 99.